Front panel of a controller



FIG. 1 is a front view of a front panel of a controller showing our new design;

FIG. 2 is a front view of a front panel of a controller of FIG. 1 further incorporating a horizontal bar display;

FIG. 3 shows a front view of the front panel of FIG. 2 mounted in a water heater; and,

FIG. 4 shows a perspective view of the front panel of FIG. 2 mounted in a water heater.

In the drawings, the broken lines are for the purpose of illustrating environment only and form no part of the claimed design. 

CLAIM The ornamental design for a front panel of a controller, as shown and described. 